HariPrasad
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Hyderabad metro rail creates record; completes 27 km, 1,000 spans in 20 months
View attachment 40967
The significance of record can be measured by the fact that Mumbai Metro Rail took about seven years to complete 11 km of metro viaduct; Bangalore and Chennai took over five years to complete about 25 km of viaduct each. Delhi took more than three years to achieve the same
Metro creates record; completes 27 km, 1,000 spans in 20 months - The Hindu
This is called the learning effect.